[zircon][kernel] Use proper time types and overflow-safe arithmetic

This change is preparation for converting zx_time_t and zx_duration_t
from unsigned to signed types (ZX-2100).

1. Fix several places where the wrong time type was used (e.g.
zx_time_t instead of zx_duration_t). Because these are simple typedefs
it's easy to use the wrong one. While it generally doesn't cause a
problem, using the wrong type can be misleading and lead to bugs like
passing a relative time when an absolute time is expected.

2. Update kernel/ and some other parts of zircon to use the new
overflow-safe arithmetic functions from zircon/time.h.

Performance: Ran "/pkgfs/packages/zircon_benchmarks/0/bin/app -p" on
NUC before and after this change. Differences were withing the noise,
some slightly faster, some slightly slower.

Test: CQ

ZX-2100 #comment cleanup before conversion

Change-Id: I75d074e5850ade5385decd9bbf330497bf7610e9

[utest][handle-wait] Reliably wait for event thread to be waiting

ZX-1836 #done

Change-Id: Id809d3aee3b63f0f549c43ab6f1f9867a5718efa

[zx] Magenta -> Zircon

The Great Renaming is here!

Change-Id: I3229bdeb2a3d0e40fb4db6fec8ca7d971fbffb94

[unittest] Use ASSERT_NE()/EXPECT_NE() instead of ASSERT_NEQ()/EXPECT_NEQ()

This is to make the interface more consistent with gtest, which uses
the _NE suffix rather than _NEQ for "not equal".

Change-Id: Ic03fda7322ab79cbd806c8f849b6956d201c6d45

[utest][handles] don't treat handles as signed

Otherwise we can't build when they become unsigned.

Change-Id: I9af3e25c9716a41985320016c5559c09d6c8e520

[utest][core] MX_ERR_-ify the core unit tests

Change-Id: Iebfbeba437831ad4b85d1b0bc6d6dc22bb721de9

[magenta][sysgen] Make scalar OUTs returns instead

Change syscalls.sysgen to move scalar OUT params to the returns
list, instead of input args.

This clarifies the expectations of these parameters and allows us
to change the user-space signatures to more idiomatic
representations for any language.

It also makes the register-passing changes a little simpler.

Change-Id: Ia6f5f3e55516c85bb879d9e91af224ce26f0015f

[time] Switch callers of syscalls with timeouts to use conversion function

This is in preparation for moving syscalls to absolute deadlines rather
than relative timeouts.

Change-Id: Ic85abbf76f34fbce7899c2505be840e3d3dcf7ff

[kernel][magenta] Remove mx_handle_cancel syscall

Superseeded by mx_port_cancel(), its other uses are
not that great.

Change-Id: I5dee60ffb6853ab09ac621d240772bb23cfbc71a

[syscalls] rename object_wait_cancel to handle_cancel

1. This acts on handles, not the objects behind them

2. Operations canceled are not limited to just object_wait_*()

Change-Id: I6b116e966217972bc5d77c7e1f90e864ab2c6406

[kernel][magenta] Odds and ends for async wait

- Update the docs with the two new syscalls
- move the options param of cancel to the end
- add an libmx cancel call

Change-Id: Ib88312c4fd4bd1a7db4adb42830e0b634b792a59

[kernel][magenta] Cancelation

new syscall: mx_object_wait_cancel()

Allows you to cancel both object_wait_ and object_async_wait
syscalls. The existing pattern of closing the waited on handle
is preserved but the error status that both cases returns is
changed from

ERR_HANDLE_CLOSED
to
ERR_OPERATION_CANCELED

The previous status is kept but deprecated. In a followup
CL the rest of the magenta callers will be converted and
in a further CL the fuchsia callers will be converted.

Change-Id: I0fbbe664e4ef9d798d2068230d40fb6a36750d02

[syscalls] update callers to mx_handle_wait_*() and deprecate

Change-Id: I7b0516007b99d58aee906eac62358625100ee32e

[signals] Remove legacy signal names

Change-Id: I6d4543358a16d16b9b9028ede06af40a632ba31b

[syscalls] update mx_handle_duplicate() and mx_handle_replace()

Change-Id: Ie332f4a924311c0bf1f93031712853c33027c411

[syscalls] update mx_handle_wait_one()

Change-Id: I03c03b0c02041e680e44930e4d8c22f380d26916

[utest][channel] msgpipe => channel in core utests

Change-Id: I6c50e0828fd905adaa75296952ae9caefaf88925

[syscalls] update event_create()

Change-Id: Ib736156e938357066505865379a4438ab4768aec

[ulib][unittest] Add printf format checking for unittest_printf*

This catches bugs in unittest_printf* calls like in *printf calls.
Several such bugs in tests are now fixed.

Change-Id: Id722fd9a2ba31547c298025eaf52fb56088466e9

[runtime][musl] Have libc handle thread return values, not runtime

This was originally in runtime, and entirely not moved up into libc when
some other things did. This is test by the existing c11-thread test.

Change-Id: If50a9ac28cf09a8a4eeeb1ada88fb38464fa3aa6

[utest] Fix handle-wait-test: make it use C11 threads instead of tu_thread_create().

tu_thread_create doesn't set up TLS appropriately, so you can't, e.g.,
printf from the thread it creates.

MG-288 #comment One (handle-wait.c) down, N to go.

Change-Id: Ia102d796e08b331a0e2f5542fe28d0405d3e23c5

sync errors.md with fuchsia-types.def

ERR_NOT_ENOUGH_BUFFER -> ERR_BUFFER_TOO_SMALL
ERR_FLOW_CONTROL -> ERR_SHOULD_WAIT
ERR_NOT_READY -> ERR_UNAVAILABLE
ERR_NOT_AVAILABLE -> ERR_ALREADY_BOUND
ERR_I2C_NACK -> ERR_IO_REFUSED
ERR_CHECKSUM_FAIL -> ERR_IO_DATA_INTEGRITY

Add ERR_IO_DATA_LOSS
Remove ERR_CANCELLED

Change-Id: Ibe27bc5198cc4d83ed384bf2858cfca0a8694d4c

[magenta][bikeshed] Make code speak proper `merican

Normalize the spelling of the adjective (signaled), verb (signaling)
and subjective noun (signaler) form of Signal in the code base to the
American spelling (one L instead of two).

Change-Id: I33a699cdd7a46e8cf4fb463f46422fac2305a659

[magenta][syscalls] migrate all syscalls to the new names

If DEPCRECATE_COMPAT_SYSCALLS is defined, flag the compatibility
wrappers with the deprecated attribute.

Enable this in the Magenta build only for now.

Change-Id: I422b1294d9db2e56551eca65dede0e5d83f8b363

[system] Move system/* includes to magenta/* under global.

Change-Id: I9b8673a16162da3bd1328a2eae3fbd855f1a7730

[kernel][magenta] switch thread/process creation syscalls to a two phase api

-In both thread and process creation apis, require user space create the
object first, then start it with additional args
-For threads stack allocation is also moved to user space
-Wire up the process/thread handles to be transferred through to new processes

Change-Id: I43d447c86af1ab3199d8dcf29ff4fe3a384b6e65

[system] align license and license banners with Fuchsia

This adjusts the Magenta userspace code to match the prevailing
license in Fuchsia (three-clause BSD), using the same banner
and license text.

Change-Id: I6b6d79435c5dbaa32027888874849e4f47aaa7be

[utest] Support categories

This will produce single binary from mxr tests and also seperate binary
for each test

Change-Id: I9345fbeab5751dda356cfd47a766c09957211923